<!DOCTYPE html>
<html>
<head>
    <title>Add Example 3</title>
    <script type="text/javascript">
            
        var num1 = 5;
        var num2 = 10;
        var message = "The sum of 5 and 10 is " + (num1 + num2);
        alert(message);    //"The sum of 5 and 10 is 15"

        
        
       
    </script>

</head>
<body>
  
</body>
</html>